1 files changed, 79 insertions, 0 deletions
diff --git a/examples/quick/scenegraph/openglunderqml/squircle.py b/examples/quick/scenegraph/openglunderqml/squircle.py
new file mode 100644
index 000000000..d2900198b
--- /dev/null
+++ b/examples/quick/scenegraph/openglunderqml/squircle.py
@@ -0,0 +1,79 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+from PySide6.QtCore import Property, QRunnable, Qt, Signal, Slot
+from PySide6.QtQml import QmlElement
+from PySide6.QtQuick import QQuickItem, QQuickWindow
+
+from squirclerenderer import SquircleRenderer
+
+# To be used on the @QmlElement decorator
+# (QML_IMPORT_MINOR_VERSION is optional)
+QML_IMPORT_NAME = "OpenGLUnderQML"
+QML_IMPORT_MAJOR_VERSION = 1
+
+
+class CleanupJob(QRunnable):
+    def __init__(self, renderer):
+        super().__init__()
+        self._renderer = renderer
+
+    def run(self):
+        del self._renderer
+
+
+@QmlElement
+class Squircle(QQuickItem):
+
+    tChanged = Signal()
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._t = 0.0
+        self._renderer = None
+        self.windowChanged.connect(self.handleWindowChanged)
+
+    def t(self):
+        return self._t
+
+    def setT(self, value):
+        if self._t == value:
+            return
+        self._t = value
+        self.tChanged.emit()
+        if self.window():
+            self.window().update()
+
+    @Slot(QQuickWindow)
+    def handleWindowChanged(self, win):
+        if win:
+            win.beforeSynchronizing.connect(self.sync, type=Qt.DirectConnection)
+            win.sceneGraphInvalidated.connect(self.cleanup, type=Qt.DirectConnection)
+            win.setColor(Qt.black)
+            self.sync()
+
+    @Slot()
+    def cleanup(self):
+        del self._renderer
+        self._renderer = None
+
+    @Slot()
+    def sync(self):
+        window = self.window()
+        if not self._renderer:
+            self._renderer = SquircleRenderer()
+            window.beforeRendering.connect(self._renderer.init, Qt.DirectConnection)
+            window.beforeRenderPassRecording.connect(
+                self._renderer.paint, Qt.DirectConnection
+            )
+        self._renderer.setViewportSize(window.size() * window.devicePixelRatio())
+        self._renderer.setT(self._t)
+        self._renderer.setWindow(window)
+
+    def releaseResources(self):
+        self.window().scheduleRenderJob(
+            CleanupJob(self._renderer), QQuickWindow.BeforeSynchronizingStage
+        )
+        self._renderer = None
+
+    t = Property(float, t, setT, notify=tChanged)